The Mystery on Walrus Mountain: (Ghost Twins, #3)

What happens when ghosts go inside computer skiing games? Robbie finds out. It's terrifying when he and his ghost dog, thatch, try to help a young ski champion who has recovered from an injury but is afraid to ski on real ski slopes. RL 3, Ages 7-12

Long Synopsis:

[from the back cover]
"Robbie and Rebeka are twins.
They have a St. Bernard.
Fifty years ago they became ghosts!
Now their house is a vacation rental.
What do these ghosts do with their time?
Haunt unsuspecting guests!
The Mystery on Walrus Mountain
Noah French was an expert skier until he broke his leg last year. Now, he won't get back on his skis. His parents, who are professional ski racers, take him to stay at the Kickingbird Lake Resort. There, the ghost twins watch him play a skiing/adventure game on his computer. They become caught up in the game and then Thatch, their St. Bernard, goes into the computer! The twins try to get him out. Can Noah help them? Can the twins and Thatch get Noah back to skiing on a real mountain?
If you haven't read the 7 other books in this series, there's lots of ghostly goings on ahead for you. Bookshare has all of the Ghost Twins Books. Check out #1 The Mystery of Kickingbird Lake, #2 Mystery of One Wish Pond, #4 The Missing Moose Mystery, #5 The Mystery of the Disappearing Dogs, #6 The Haunted Campground Mystery, #7 The Mystery of Hanover School and #8 The Mystery of the Haunted Castle.